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【多选题】
显示/etc/passwd文件中的带有root字样的行,并存储到一个名为root.txt的文件中,下面那些命令是正确的?A.
grep root /etc/passwd 1>root.txt
B.
cat /etc/passwd|grep "root">root.txt
C.
grep root /etc/passwd>root.txt
D.
cat /etc/passwd|grep root>root.txt
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反馈参考答案：
举一反三
【单选题】“咸日新其用,大济蒸人,华叶递荣,声实相副。盖教之著矣,亦天之假也。”句中释义错误的是
A.
“咸”义为都
B.
“新”义为更新,作动词用
C.
“蒸人”义为病人
D.
“递”义为交替、轮流
E.
“假”义为借助
【单选题】Peter doesn’t tell me when he ____________. I’ll telephone you as soon as he ____________.
A.
will come, comes
B.
will come, will come
C.
comes, will come
D.
comes, comes
【单选题】'The moment ________ soon,' he thought to himself, waiting nervously. [ ]
A.
came
B.
has come
C.
was coming
D.
is coming
【单选题】The managing director promised that he would _____ me as soon as he had any further information.
A.
communicate
B.
notice
C.
notify
D.
note
【单选题】“咸日新其用,大济蒸人,华叶递荣,声实相副。盖教之著矣,亦天之假也。”句中释义错误的是
A.
A“咸”义为都
B.
B“新”义为更新，作动词用
C.
C“蒸人”义为病人
D.
D“递”义为交替、轮流
【单选题】'The moment _____soon,' he thought to himself, waiting nervously.
A.
came
B.
has tome
C.
was coming
D.
is coming
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